Big Mom's crew is pretty dope, it makes me wish we'd get a bigger arc featuring theme vs all the Strawhats, but it seems we're nearing the climax of the arc already. I think the most we're going to see of them will just be fights against the Commanders. Brook and Pedro are probably going to face Smoothie, and Chopper and Carrot will probably face the other one by finding him/her in one of the mirrors. Sanji will probably fight Vinsmoke Judge as well. I think Luffy might take a backseat for a while in this arc, maybe have a scuffle with Big Mom but I don't think he'll defeat her.
With the two vs. one theme against all of the big bads this arc, I wonder if Zeff (or perhaps...Gin?) is going to appear at some point and aide Sanji in fighting Judge. Either that or maybe the entire Baratie crew will appear to take on each of the brothers. Gin?, Patty, Carne vs the three Vinsmoke brothers. Maybe Zeff will confront Reiju but instead of fighting her, she leads Zeff to Judge for him to fight. I'm willing to bet Gin is part of Buggy's mercenary group.
Also the Poneglyph revelation is pretty neat. So the "Rio Poneglyph" isnt' something that is at Raftel, but more-so a collection of several Poneglyphs that spell out the true history. Interesting.
This arc is setting it up pretty nicely that Big Mom will warm up to the Strawhats. Once she finds out from Pekoms they saved Zou from Jack as well as finding out they're friends with Lola, she's probably going to ally herself with them in some form.
Pedro and Pekoms possibly having a flashback in this arc lends a lot to their credibility as being possible Strawhats as well. I wonder how they got entangled into searching for the Poneglyphs and there's a bigger story reason for it.